Lubricating-pump.



PATENTED JULY 14, 1908.

i. s. WARD. LUBRIGATING PUMP.

APPLICATION FILED MAR. 9, 1908.

UNIT-'an STATES PATENT ormon- JOHN S. WARD, OF CHICAGO, ILLINOIS, SSIGNOR TOPHENIX LUBRICATOB- COMPANY, OF

y CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LUBRICATING- PMR Appucaann and nach e,

T o all whom it Amay concern.'

Be it known that l, Joux WERD, a citizen of the United States, residing at (hicago, in the county of (look and State of Illinois',

have invented a certain new and useful Improvement in Lubricating-Pumps, of which the following is a spocilicat-ion. l

My invention relates to pumps, especially lubricating pumps, and the object is to im;- lc prove certain characteristics of the pump shown and described in my application filed December 23, 1907, Serial No. 407,846. Speciiically, the improvements in the presentV v application result from first, the providing of a plunger within the hollow piston adapted to work within the tube which is located within said piston, and second, the locating of the inlet valve which supplies liquid to the piston chamber, directly beneath said piston chamber instead of at the side thereof, as in the previous application. f in the accompanying drawings which illustrate the improved construction, Figure 1 is a side elevation of the casing which contains the inner working parts; Fig. 2 is a vertical section thereof taken on the line 2-2 of Fig. 3, Fig.v3 is a horizontal section taken on the line 3-3 of Fig. 1, Fig. 4 is a horizontalsection taken on the line 4-4 of Fig. 2. Figi 5 is a vertical section taken on the broken line 5--5 of Fig. 3.

In the drawings, the valve casing l0 has a horizontal piston chamber 11. A tube 12 is arranged in thecasing in such manner as to lie mostly within said piston chamber and communicates with the pump chamber 13. Said tube is rigidly lastened to the casing by oi the screw 12a (Fig. 3) or in any' other suitable manner, and has an outside.

so diameter less than the diameter oi said piston chamber. Said tube is located concentrically within the piston chamber so as to leave a cylindrical space for receiving the hollow 'reciprocating piston 30, hereinafter described. The chamber 13 has an ,inlet lort 14 rovidcd with an inlet valve 15 an an out et port 16 provided with an outlet valve, I7. Communicating with the iston'chamber Il is an inlet port 18 provided With an 50. inlet valve 19. Saidport and valveA are located directly beneath said piston chamber instead of at the-side thereofxassshlown in the previously mentioned application', the advantage 1n` the present construction being that the flow of liquid is straight through Specification of Letters E'atent.

- Patented ,my 1.4, i908.

1908. Serial No..419,913.

vIn the casing below the valve 19 is a screwA cap 23, and if this cap is removed, thepiston chamber ma be supplied with liquid directly from t e outside of the casing through the port 18 and valve 19. In the preferred form of device', however, instead oi being 'supplied directly from the outside, the liqui is led to it from the pump chamber 13 through pipe 24 to a sight feed 25, thence through pipe 26 to the passage 27, which communicates with the inlet port 18. By thus leading the li uid from one pump chamber to another thediquid makes a continuous passage through them and the pump becomes what may be termed a tandem pump, wherein force is applied to the liquid at tivo different points in its passage.

rlhe piston 30 is hollow so as to fit over the tube 12 and is closed at its outer end by the head 31, as best shown in Fig. 2. A plunger 32 is rigidly secured inside the piston and is so constructed as to make a close sliding fit within the tube 12. Said plunger in its preferred form is long enough tov reach nearly to .the inner end of said tube when the piston is at the inner extremity of its travel. The object in providing plunger 32 is to reduce :the amount of space communicating with the `chamber 13; and also to decrease the liabilit lof leakage between the outside and in'si e of tube 12, for it-is obvious that when plunger 32 is absent, the liquid gains access to the inside of the piston behind tube 12, and under high pressure there would be some possibility ofleakage between the outside of ,said tube and the yinside of the piston. With 'the plunger present, however, -the liquid cannot gainy access to the-inside of tube 12 eX- cept for a limited distance.- fln consequence, leakage from one pump chamber directly to the other through tube 1 2 is practically impossible. no matter how high pressure the pump 1s Working against. i

Any nsuitable means may be employed for iti ' saidcasing and being open at both ends, one c end 0i' said tube lying within said iston and 30 and egress of liquid to and from the end of the tube opposite to the ,ber through. said casing,

l and. fitting over said tube Alor caiising' liquid j to'enter and leave the chaml)ercommunicat- I claim as new .or said directly .open at beth. ends,- and adapted toifitwthin kfor causing li uid to enter and leave it, said 'a pump chamber and suitable valves ltherefor, a tube commumratmg with said pump chamber, a lclosed-end nston litting over causing the' travel ofthe pistombut desc'ription is unnecessary. here as such operating means form no part of the present invention andare Well known in the art.

A lHavingthus described myinvention, what I and desire to'secure by Letters'Patent, is: 1.V A pump having acasing provided with a piston chamber and ports leadin thereto and therefrom, an inlet-spd an out et valve ports, said Vinlet valve being located neath its ort ahollow piston fit-S. ting in Vsaid piston c rain "er and being closed. at its outer end', and a tube in said casing,

said pistcmsaid casing has-'mg a second pair of ports `and valveatlierein and said tube communicating at one. endv With said second pair of ports and ival'ves.- Y

2.' A pump having acasing provided with a piston chamber and ports leadinv thereto and therefro`1n, a'x inlet and an outilet valve for said erts, the inlet valve being located directly `eneath its port, ahollow piston litti'ng in said piston chamber and being closed at lts outer end, a tube rigidly fastened in being Vclosed thereby, a passage 0r ingress end which is closed by said piston. ,y

In a pump, the combination ofa casing having'a piston chamber and so constructed that liquid may enter and Vleave said chaman inlet valve located directly beneath said piston chamber and guarding the entrance there-to, an outlet valve located above said piston chamber and guarding the exit therefrom,l a tube in said casing, said casing having a chamber cemmunicating with the inside lof said tube whereby liquid may enter vand leave said casing without entering said piston chamber, and a piston fitting in said piston chamber piston being' lollow and 'closed at one .end

ing with said tube.

4. .A pumphavmg a casing provided with said tubc, said pistou( lumber andpump chamber being separated from each otherby., a portionof the casing, suitable valvesvior'.;

Vto said piston and fitting in said tube,

' casing.

,ang in Sai tube, a piston cham said piston' chamber, anda plunger fastcn 5. A pump having a casing provided with fa Pump chamber and suitah `e 'valves there for, a tube communicatinglr with said poner chamber, a closed-end ,iston lit-ting owl' said tube, said piston chamber and pump chamber being separated from each other by a portion of the casing, suitable valves for said piston cliainber, a plunger fastened io said iston andv fitting; in said tube and a -duct eadinr from oneA of said chambers so' the other nhereby the liquid."mxi\' be acted upon at two points in its travel through the pump having a casing provided with a i'ston chamber and a pump chamber-'and suitable valves therefor, a tube communicating with said pump chamber, a closed-end piston fitting over saidtube, said4 pistou chamber and ump chamber being separated from ea'ci 'other by a )ortion of, the. casing, suitable valves for said piston chamber, a plunger fastened to said piston and tit-- tube,'and a duct leading,r Vfrom said pump chamber to said piston chamber,

7. In a pump, a casing, a tube mounted therein, an .inlet and an outlet port provided with valves communicating with one end of said tube, a hollow pistr 11i1tt1ng over'said above mentioned ports an valves. said'pis-f ton chamber being adapted to receive said piston, an inlet port located directl beur-ath said piston chamber, a check valve therefor4` an outlet port also communicating with said piston chamber and a check valve therefor.

8. In a pump, a casing, a tube mounted therein, an inletand an outlet port provided with Valves communicating with one end 'of said tube,I a hollow v)iston 'litting'o'ver said tube, a piston chamber se )aratcd from the above mentioned ports and valves, said piston chamber 'being ada ted, to receive said piston, an inlet-port ocated directly beneath said' piston chamber, a check valve therefor, an outlet port also communicating with said piston chamber, a check valve therefor and a )lunger fastened to said piston and adapte lto work within said tube.

-ln lwitness whereof, I have hereunto subscribed my name in the presenceof two witnesses. v i

JOHN S. WARD. lvituesses':

NVILLIA .u PATTERSON,

lCiN`./\R"Bnuo.

)erse )varated fromt-hesie ios 

